Improvement in sheet-metal plates for shutters



e. HAYES. SHEET-METAL PLATES FOR "S-HUTTERS, m. [No.173.783. PatentedFeb. 22, 1876.

UNITED STATES PATE T OFFICE.

GEORGE HAYES, OF NEW YORK, N. Y.

IMPROVEMENT IN SHEET-METAL PLATES FOR SHUTI'ERSI &c.

Specification forming part of Letters Patent No. 173,783, dated February22, 1876; application filed November 18, 1875.

CASE C.

To all whom it may concern:

Be it known that I, GEORGE HAYES, of N0. 717 Eighth Avenue, in the city,county, and

State of New York, have invented a new and useful Improvement inSheet-Metal Plates for the outside covering of Fire-Proof Shutters,doors, or the panels of doors, for the in'closing of public urinals, andwater-closets, and

for any other required purpose.

My improvement relates to metal plates indented or embossed and piercedor punctured. These punctured openings and indentations are so.peculiarly made that they impart strength to the plates, and their beingranged in an alternate or irregular position in the plate offering noimpediment while expanding or contracting, causing no derangement of thesurface, and taking out of it all uneven or buckled or puckeredappearance, rendering the plates as strong and equal to plates that "arecorrugated, Without reducing the area of,

the plate, as it does in the process of corrugaiing; consequently asaving of metal is effected. The present process of straightening orremoving the buckle from a ,plain sheet of metal occupies considerabletime and labor,

and can only be done by the most skilled mechanic, and as my plates arestraightened,

embossed, and punctured at the same time a saving of both laborandmatcrial is obtained.

These metal plates, when pierced or punctured, will exclude the directrays of the sun and rain, will admit of light and air, and will resistfire longer than any other plate, whether plain or corrugated.

My improvement consists of a plate of metal which, by a peculiarprocess, I puncture and indent throughout the whole or part of thesurface without regard to any particular number, or spacing, or positionof the punctures or indentations. The puncture is of a V form, the poiutbeing downward, and the sides which are cut through diverge from thepoint in an upward curvilinear direction, ter. I

minating three-fourths of an inch from the point, more or less. Thecutters or tools with which this puncture is made have two sides, madesharp for the purpose of cutting through the metal, While the third orupper side of the new and desire to secure by Letters Patent A newarticle of manufacture, consisting of a plate of metal, punctured orpierced and embossed or indented, as hereindescribed.

' GEORGE HAYES.

VVitnesse's AMsoN HACKER,

WILLIAM DYATT.

